01What does past test data tell you about your next test?
How often the same kind of change was kept in other shops. A change that shops keep again and again is a better bet than one that was tried and dropped.
Apex turns that into one Likelihood to Win per idea, adds the impact and effort for your shop, and ranks your backlog. In the vendor’s holdout check, the top third of ideas within a shop won 1.4 to 1.6 times as often.
02How much past test data does each tool name?
Apex names 4.3 million A/B tests from 151,000 shops; Kameleoon names more than 20,000 experiments behind PBX Ideate; Varify names 10,000 or more test patterns. Most other vendors publish no count.
Disclosure
We build and sell Apex by DRIP. Figures for other tools are vendor-stated, checked October 2026.
Past test data behind each tool’s prediction (vendor-stated, October 2026)
| Tool | Data named | What it predicts |
|---|---|---|
| Apex by DRIP | 4.3 million A/B tests from 151,000 shops, since 2011 | A Likelihood to Win per test idea, before launch |
| Kameleoon PBX Ideate | More than 20,000 experiments | A score per idea, before launch |
| Varify | 10,000 or more test patterns | Test ideas from patterns |
How each tool predicts, and how to check a vendor’s claim, is in our guide to predictive A/B testing.
